Answer Happy

1. How many joules of heat are required to heat 125g
aluminum from 19.0oC to 95.5oC?
2. How many joules of heat are required to heat 25.0g of
ethyl alcohol from the prevailing room temperature,
22.5oC, to its boiling point,
78.5oC?
3. What is the correct unit of measurement for each of
the following?
a) 1000 m
b) 0.1 g
c) 0.000001 L
d) 0.01 m
e) 0.001 L
4. Solve the following problems, stating answers to the
proper number of significant figures:
a) 12.62 + 1.5 + 0.25 =
b) (2.25 x 103)(4.80 x 104) =
c) (452)(6.2) / 14.3 =
d) (0.0394)(12.8) =
e) 0.4278 / 59.6 =
f) 10.4 + 3.75(1.5 x 104) =
9. Complete the following American/metric conversions
using the correct number of significant figures:
a) 42.2 in. to cm
b) 0.64 m to in.
c) 2.00 in.2to cm2
d) 42.8 kg to lb
e) 3.5 qt to mL
f) 20.0 L to gal
g) 22.4 L to micrometers
14. Make the following conversions using the correct
number of significant figures:
a) 35.6m to ft
b) 16.5 km to mi
c) 4.5 in3 to mm3
d) 95 lb to g
e) 20.0 gal to L
f) 4.5 x 104 ft3 to
m3
19. The average temperature on Venus is
460oC. What is this temperature in
oF?